public class dudu {
    public static void main(String[] args) {
        System.out.println("写了线程的状态，线程安全的博客，三个小时很详细!");
        //Float f = 1.0;
        Float f1 = new Float(10);
        //float f2 = 45.0;
        String s = "hello,world\0";
    }
}
